HAMAKA GUGULUZA Gun Cleaning Rope fit .177/.22 / .223/5.56 mm/7mm/44/.30/12/16/20GA It may be tight when first time you used it 22 styles for your choice Designated lubrication zone on the handle; brass weight on the pull cord is stamped with size it is an bore cleaning tool that pulls through your barrel and cleans it thoroughly in just a few seconds. Built in brass brushes, multiple short brushes embedded in the floss pass easily through the shortest action or port.